DE202012101478U1 - Touch sensor with counter capacitance electrodes and self-capacitance electrodes - Google Patents

Touch sensor with counter capacitance electrodes and self-capacitance electrodes

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Publication number
DE202012101478U1
DE202012101478U1 DE201220101478 DE202012101478U DE202012101478U1 DE 202012101478 U1 DE202012101478 U1 DE 202012101478U1 DE 201220101478 DE201220101478 DE 201220101478 DE 202012101478 U DE202012101478 U DE 202012101478U DE 202012101478 U1 DE202012101478 U1 DE 202012101478U1
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Germany
Prior art keywords
electrodes
plurality
touch sensor
electrode
edge
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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DE201220101478
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German (de)
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Atmel Corp
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Atmel Corp
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Publication date
Priority to US13/328,967 priority Critical patent/US20130154996A1/en
Priority to US13/328,967 priority
Application filed by Atmel Corp filed Critical Atmel Corp
Publication of DE202012101478U1 publication Critical patent/DE202012101478U1/en
Application status is Expired - Lifetime legal-status Critical
Anticipated expiration legal-status Critical

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    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K17/00Electronic switching or gating, i.e. not by contact-making or -braking
    • H03K17/94Electronic switching or gating, i.e. not by contact-making or -braking characterised by the way in which the control signal is generated
    • H03K17/96Touch switches
    • H03K17/962Capacitive touch switches
    • H03K17/9622Capacitive touch switches using a plurality of detectors, e.g. keyboard
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04111Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K2217/00Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96Touch switches
    • H03K2217/9607Capacitive touch switches
    • H03K2217/960755Constructional details of capacitive touch and proximity switches
    • H03K2217/960775Emitter-receiver or "fringe" type detection, i.e. one or more field emitting electrodes and corresponding one or more receiving electrodes

Abstract

A touch sensor having a first edge and a second edge that is approximately perpendicular to the first edge, wherein the touch sensor comprises:
a first plurality of electrodes which are approximately parallel to the first edge;
a second plurality of electrodes which are approximately parallel to the second edge;
a first plurality of nodes, each of the first plurality of nodes being formed by capacitive coupling between an electrode of the first plurality of electrodes and an electrode of the second plurality of electrodes;
a third plurality of electrodes;
a second node formed by the third plurality of electrodes, each of the third plurality of electrodes forming part of the second node by self-capacitance coupling; and
wherein at least one of the portions of the second node is positioned between at least two of the first plurality of nodes.

Description

  • Technical area
  • The present disclosure generally relates to touch sensors.
  • background
  • A touch sensor may determine the presence and location of a touch or the proximity of an object (such as a user's finger or stylus) within a touch-sensitive area of the touch sensor overlaid on a screen. In a touch-sensitive display application, the touch sensor may allow the user to interact directly with what is displayed on the display rather than indirectly with a mouse or touchpad. A touch sensor may be attached or provided as part of the following: desktop computer, laptop computer, tablet computer, personal digital assistant (PDA), smartphone, satellite navigation device, portable player, portable game console, kiosk computer, cash register system or other suitable Equipment. An input field of a home or other application may include a touch sensor.
  • There are a variety of different types of touch sensors, such as (for example) resistive touch-sensitive screens, touch-sensitive screens based on surface acoustic waves, and capacitive touch-sensitive screens. A reference to a touch sensor may include a touch screen and vice versa. When an object touches or comes into contact with the surface of a capacitive touch sensor, there may be a change in capacitance within the touch screen at or near the touch. A control unit of the touch sensor may process the change in capacitance to determine its position on the touch screen.
  • Touch sensors typically include an electrode pattern, such as one of the electrode patterns of the touch sensors incorporated in the 1E - 1G are illustrated. However, touch sensors with these typical electrode patterns may be inadequate.
  • Brief description of the drawings
  • 1A illustrates an example of a touch sensor with an example of a touch-sensor controller.
  • 1B illustrates a system having a single-layer configuration of electrodes that implement self-capacitive coupling.
  • 1C illustrates a system with a single-layer configuration of electrodes implementing counter capacitance coupling.
  • 1D illustrates a system with a two-layered configuration of electrodes that implement a mutual capacitive coupling.
  • 1E Figure 11 illustrates an example of a touch sensor having a two-layered configuration of electrodes that implement a mutual capacitive coupling.
  • 1F FIG. 11 illustrates another example of a touch sensor having a two-layered configuration of electrodes that implement a mutual capacitive coupling.
  • 1G FIG. 11 illustrates another example of a touch sensor having a two-layered configuration of electrodes that implement a mutual capacitive coupling.
  • 2A - 2 B illustrate examples of touch sensors that include both electrodes having a mutual capacitance coupling and electrodes that implement self-capacitive coupling.
  • 3 illustrates another example of a touch sensor that includes both electrodes that implement a mutual capacitance coupling and electrodes that implement self-capacitive coupling.
  • 4 illustrates another example of a touch sensor that includes both electrodes that implement a mutual capacitance coupling and electrodes that implement self-capacitive coupling.
  • 5 illustrates an apparatus that includes each of the touch sensors of 1A - 4 may include.
  • Description of the Exemplary Embodiments
  • 1A illustrates an example of a touch sensor 10 with an example of a touch-sensor controller 12 , touch sensor 10 and touch-sensor controller 12 For example, the occurrence and location of a touch or the proximity of an object within a touch-sensitive area of the touch sensor 10 detect. The reference to a Touch sensor may include both the touch sensor and its touch sensor controller. Similarly, a reference to a touch-sensor controller may include both the touch-sensor controller and its touch sensor. The touch sensor 10 may include one or more touch-sensitive surfaces. touch sensor 10 may include a range of drive and sense electrodes (or a range of electrodes of a single type) disposed on one or more substrates, which may be made of a dielectric material. A reference to a touch sensor may include both the electrodes of the touch sensor and the substrate (s) on which they are disposed. Alternatively, a reference to a touch sensor may include the electrodes of a touch sensor but not the substrate (s) on which they are disposed.
  • An electrode (whether a drive electrode or a sense electrode) may be a region of conductive material occupying a shape, such as a circular disk, a square, a rectangle, a thin sheet, or other suitable shapes, or suitable combinations of these. One or more cuts in one or more layers of conductive material may (at least partially) determine the shape of an electrode, wherein the surface of the shape may be (at least partially) bounded by these cuts. In particular embodiments, the conductive material of an electrode may occupy approximately 100% of the area of its shape. For example, but not by way of limitation, an electrode may be made of indium tin oxide (ITO) and the ITO of the electrode may occupy approximately 100% of the area of its shape (sometimes called a 100% fill). In particular embodiments, the conductive material of an electrode may occupy substantially less than 100% of the area of its shape. For example, but not by way of limitation, an electrode may be fabricated from thin sheets of metal or other conductive material (FLM), such as copper, silver, or a copper or silver based material, with the thin traces of conductive material about 5%. take the surface of its shape in a hatched, reticulated or other suitable pattern. Reference to FLM includes such material. Although the present disclosure describes particular electrodes made of a particular conductive material and which has specific shapes with special fillings and patterns, the present disclosure includes all suitable electrodes made of any suitable conductive materials, all of which are suitable shapes with all suitable filling proportions with all suitable samples.
  • The shapes of the electrodes (or other elements) of the touch sensor may, in whole or in part, constitute one or more macroelements of the touch sensor. One or more characteristics of implementing such shapes (such as the conductive material, fillings, or patterns within the fillings) may be all or part of one or more microelements of the touch sensor. One or more macroelements of a touch sensor may determine one or more characteristics of its functionality and one or more microelements of the touch sensor may determine one or more optical properties of the touch sensor such as transmission, refraction, or reflection.
  • A mechanical arrangement may include the substrate (or multiple substrates) and the conductive material which may be the drive or sense electrodes of the touch sensor 10 shapes, involve. By way of example, but not limitation, the mechanical arrangement may include a first layer of optically clear adhesive (OCA) under a cover plate. The cover may be transparent and made of a durable material suitable for repeated contact, such as glass, polycarbonate or polymethylacrylate (PMMA). The present disclosure includes all suitable cover plates made of any suitable materials. The first layer of the OCA may be located between the cover plate and the substrate with the conductive material forming the drive or sense electrodes. The mechanical assembly may also include a second layer of OCA and a dielectric layer (which may be made of PET or other suitable material, similar to the substrate with the conductive material forming the drive or sense electrodes). Alternatively, a thin layer of dielectric material may be used in place of the second layer of the OCA and the dielectric layer. The second layer of the OCA may be located between the substrate and the conductive material making up the drive or sense electrodes and the dielectric layer. The dielectric layer may be coupled between the second layer of the OCA and an air gap to a display of a device surrounding the touch sensor 10 and the touch-sensor controller 12 includes, be located. By way of example, but not limitation, the cover plate may have a thickness of about 1 mm; the first layer of the OCA may have a thickness of about 0.05 mm; the substrate with the conductive material forming the drive or sense electrodes may have a thickness of about 0.05 mm; The second layer of the OCA may have a thickness of about 0.05 mm to have; and the dielectric layer may have a thickness of about 0.05 mm. Although the present disclosure describes a particular mechanical arrangement having a specific number of specific layers made of specific materials and having a particular thickness, this disclosure includes all suitable mechanical arrangements with any suitable number of any suitable layers, any of which suitable materials are made and which have all suitable thicknesses. For example, but not by way of limitation, in specific embodiments, a layer of adhesive or dielectric, the dielectric layer, the second layer of the OCA, and the air gap may be replaced as described above so that there is no air gap to the display.
  • One or more sections of the substrate of the touch sensor 10 may be made of polyethylene terephthalate (PET), silver on PET, carbon on PET, a printed circuit board (PCB), a flexible circuit board (FCB), glass or other suitable material. The present disclosure includes all suitable substrates with all suitable sections made of any suitable materials. In particular embodiments, the readout or drive electrodes of the touch sensor 10 wholly or partly made of ITO. In particular embodiments, the drive or sense electrodes of the touch sensor 10 be made of thin sheets of a metal or other conductive material. By way of example but not limitation, one or more portions of the conductive material may be copper or copper based and have a thickness of about 5 μm or less and a width of about 10 μm or less. As another example, one or more portions of the conductive material may be silver or silver-based and similarly have a thickness of about 5 μm or less and a width of about 10 μm or less. The present disclosure includes all suitable electrodes made of any suitable materials.
  • touch sensor 10 can implement a capacitive form of touch detection. In a counter capacitance implementation, the touch sensor 10 a range of drive and sense electrodes which form a range of capacitive nodes. A drive electrode and a sense electrode may form a capacitive node. The drive and sense electrodes which form the capacitive node may come close to each other but have no electrical contact with each other. Instead, the drive and sense electrodes may be capacitively coupled to each other across a gap. A pulse or AC voltage applied to the drive electrode (by the touch-sensor controller 12 ) can induce a charge on the readout electrode, whereby the amount of induced charge can be influenced by an external influence (such as a touch or the proximity of an object). When an object touches or gets near the capacitive node, there may be a change in capacitance at the capacitive node and the touch-sensor controller 12 can measure the change in capacity. By measuring the change in capacitance across the range, the touch-sensor controller can 12 the position of the touch or proximity within the touch-sensitive area (s) of the touch sensor 10 determine.
  • In a self-capacitive implementation, touch sensor 10 include a range of electrodes of a single type, each forming a capacitive node. When an object touches or comes in close proximity to the capacitive node, there may be a change in intrinsic capacitance at the capacitive node and the touch-sensor controller 12 For example, the change in capacitance may be measured, for example, as a change in the amount of charge needed to raise the voltage on the capacitive node by a predetermined amount. As with a countercapacity implementation, the touch-sensor controller 12 by measuring the changes in capacitance over the range, the position of the touch or the proximity within the touch-sensitive area (s) of the touch sensor 10 determine. The present disclosure includes all suitable forms of capacitive touch detection.
  • In particular embodiments, one or more drive electrodes may together form a drive row which extends horizontally or vertically or in any suitable orientation. Likewise, one or more readout electrodes may together form a readout series which is horizontal or vertical or in any suitable orientation. In particular embodiments, the drive rows may be substantially perpendicular to the read rows. A reference to a drive row may include one or more drive electrodes that make up the drive row, or vice versa. Likewise, a reference to a readout string may include one or more readout electrodes that make up the readout string, or vice versa.
  • The touch sensor 10 may have readout and drive electrodes arranged in a pattern on one side of a single substrate. In such a configuration, a pair of drive and sense electrodes capacitively coupled to each other across a gap may form a capacitive node. In a self-capacitance implementation, electrodes of only a single type may be patterned on a single substrate. In addition or as an alternative to the drive and sense electrodes, which are mounted in a pattern on one side of a single substrate, the touch sensor 10 Have drive electrodes which are mounted in a pattern on one side of a substrate and readout electrodes, which are mounted in a pattern on another side of the substrate. In addition, the touch sensor 10 Have drive electrodes which are arranged in a pattern on one side of a substrate, and readout electrodes, which are arranged in a pattern on one side of another substrate. In such a configuration, a crossover of a sense electrode and a drive electrode may form a capacitive node. Such a crossover may be a position where the drive and sense electrodes cross each other or come closest to their respective level. The drive and readout electrodes have no electrical contact with each other. Instead, they are capacitively coupled to each other via a dielectric at the crossover. Although the present disclosure describes particular configurations with specific electrodes forming specific nodes, the disclosure includes all suitable configurations of any suitable electrodes that form all suitable nodes. In addition, the present disclosure includes all electrodes arranged on any suitable number of all suitable substrates in any suitable patterns.
  • As described above, a change in capacitance at a capacitive node of the touch sensor 10 indicate a touch or near input at the position of the capacitive node. The touch-sensor controller 12 can detect and process the change in capacitance to determine the occurrence and location of the touch or near input. The touch-sensor controller 12 For example, the touch or near-entry information may communicate with one or more components (such as one or more central processing units (CPUs)) of a device, which touch sensor 10 and the touch-sensor controller 12 which responds to the touch or near input by initiating a function of the device (or an application running on the device). Although the present disclosure describes a particular touch-sensor controller having a particular functionality with respect to a particular device and touch sensor, the present disclosure includes all suitable touch-sensor controllers with all appropriate functionality with respect to any suitable device and touch sensors.
  • The touch-sensor controller 12 may be one or more integrated circuits (ICs), such as general purpose microprocessors, microcontrollers, programmable logic devices or arrays, application specific ICs (ASICs). In particular embodiments, the touch-sensor controller 12 analog circuits, digital logic and digital nonvolatile memory. In particular embodiments, the touch-sensor controller 12 mounted on a FPC which, as described below, is fixed to the substrate of the touch sensor 10 connected is. The FPC can be active or passive. In particular embodiments, multiple touch-sensor controllers may be included 12 be mounted on the FPC. The touch-sensor controller 12 may include a processing unit, a drive unit, a readout unit, and a storage unit. The drive unit may drive signals to the drive electrodes of the touch sensor 10 deliver. The readout unit may charge at the capacitive node of the touch sensor 10 and transmit measurement signals to the processing unit representing the capacitances at the capacitive nodes. The processing unit may control the supply of the drive electrodes with the drive signals by the drive unit and process the measurement signals from the readout unit to determine the occurrence and location of a touch or near input within a touch-sensitive area (s) of the touch sensor 10 to detect and process. The processing unit may also detect the changes in the position of the touch or near input within the touch-sensitive area (s) of the touch sensor 10 follow up. The memory unit may store programs for execution by the processing unit, including programs for controlling the drive unit to supply the drive electrodes with drive signals, programs for processing readout unit measurement signals and other suitable programs. Although the present disclosure describes a particular touch-sensor controller having a particular implementation with specific components, the disclosure includes all suitable touch-sensor controllers with all suitable implementations and all suitable components.
  • The tracks 14 a conductive material, which on the substrate of the touch sensor 10 are attached, the drive or readout electrodes of the touch sensor 10 with the connection surfaces 16 which are also mounted on the substrate of the touch sensor. The tracks 14 and the connection surfaces 16 may be mounted on the same side of the substrate as the drive or sense electrodes, may be mounted on a different side of the substrate than the drive or sense electrodes (eg, vias through the substrate may be applied to the traces) 14 enable the drive or readout electrodes with the pads 16 or on a layer other than the drive or sense electrodes. As described below, the pads simplify 16 , the coupling of the tracks 14 with the touch-sensor controller 12 , The tracks 14 may be in and around (at the edges of) the touch-sensitive area (s) of the touch sensor 10 extend. Special tracks 14 can drive connections for the coupling of the touch-sensor control unit 12 with the drive electrodes of the touch sensor 10 provide, by which the drive unit of the touch-sensor control unit can supply the drive signals to the drive electrodes. Other tracks 14 can read-out connections for the coupling of the touch-sensor control unit 12 with the readout electrodes of the touch sensor 10 provide by which the read-out unit of the touch-sensor control unit 12 Charge at the capacitive node of the touch sensor 10 can detect. The tracks 14 may be made of thin sheets of a metal or other conductive material. For example, but not by way of limitation, the conductive material of the tracks 14 , Copper or copper-based and have a width of about 100 μm or less. As another example, the conductive material of the traces 14 , Silver or silver based and have a width of about 100 μm or less. In particular embodiments, the conductor tracks 14 in whole or in part, as an alternative or in addition to the thin tracks of a metal or other conductive material, be made of ITO. Although the present disclosure describes particular circuit traces made of specific materials having specific widths, the present disclosure includes any suitable circuit traces made of any suitable materials and having all suitable widths. In addition to the tracks 14 , the touch sensor can 10 include one or more ground traces which are connected to a ground connection (which is a connection area 16 may be) on an edge of the substrate of the touch sensor 10 end (similar to tracks 14 ).
  • The connecting surfaces 16 may be along one or more edges of the substrate outside the touch-sensitive area (s) of the touch sensor 10 be located. As described above, the touch-sensor controller 12 to be on an FPC. The connecting surfaces 16 can be made of the same material as the tracks 14 and can be firmly bonded to the FPC using anisotropic conductive film (ACF). The connection 18 may include conductive traces on the FPC that comprise the touch-sensor controller 12 with the connection surfaces 16 connect and turn the touch-sensor controller 12 with the tracks 14 and the drive or sense electrodes of the touch sensor 10 , In another embodiment, the connection surfaces 16 be connected to an electromechanical connector (such as a zero insertion force wire-to-board connector). In this embodiment, connection must be 18 do not involve FPC. The present disclosure includes all suitable compounds 18 between the touch-sensor controller 12 and the touch sensor 10 ,
  • 1B illustrates a system 100 with a single-layer configuration of electrodes that implement self-capacitive coupling. In particular embodiments, the electrode configuration of the system 100 from 1B an example of an electrode configuration of the touch sensor 10 from 1A be.
  • According to the illustrated embodiment, the field lines run 112 starting from an electrode 104 (eg, a drive electrode) connected through a circuit 116 is controlled, with the fields through the cover 108 penetrate. Part of the emitted field lines 112 extends into the free space or other portions of the cover as shown and capacitively couples with a finger (not shown) or other object if present. The circuit 116 takes a change in the self-capacitance of the capacitive node, which passes through the electrode 104 is formed by the presence of a finger (or other object) near the field lines 112 , was as though by requiring a larger charge to change the voltage at the capacitive node.
  • Since electrodes that implement self-capacitance coupling, an extension of the electric field lines 112 into free space (eg outside the cover 108 ), electrodes that implement self-capacitance coupling may be well-suited for detecting an object (such as a finger) near the cover but not touching the object. Accordingly, electrodes that implement self-capacitive coupling may be well-suited for detecting proximity (of an object). On the other hand, electrodes that implement self-capacitive coupling may not be well suited for detecting an object that contacts the cover. As such, electrodes that implement self-capacitive coupling, in some embodiments, may be used primarily in a touch-sensitive screen to detect when an object is near the cover but does not touch the cover (eg, detection of proximity).
  • 1C illustrates a system 200 with a single-layered configuration of electrodes that implement a mutual capacitance coupling. In particular embodiments, the electrode configuration of system 200 from 1 an example of an electrode configuration of the touch sensor 10 from 1A be.
  • According to the illustrated embodiment, a finger causes 224 that field lines 216 which is normally from the drive electrode 204 to the readout electrode 208 couple, through fingers 224 be absorbed, as in 220 shown. The result is a detectable change in the capacitance of the capacitive node, which through the drive electrode 204 and the readout electrode 208 is formed. In particular embodiments, the change in capacitance is associated with a variety of factors, such as fingerprint area, electrode area, thickness, and the electrical constant of the cover panel 212 , the size of the human body and the location, the thickness and conductivity of the skin, and other factors. In particular embodiments, the change in capacity is by a receiver 232 detected.
  • In particular embodiments, and in contrast to electrodes that implement self-capacitance coupling (as discussed above in connection with FIGS 1B discussed), electrodes implementing counter capacitance coupling may be well suited for detection when an object contacts the cover plate. In addition, and unlike electrodes that implement self-capacitive coupling, electrodes that implement a mutual capacitance coupling may not be well suited to detect when an object comes only near the cover but does not touch it (eg, detection of nearby). As such, electrodes that implement mutual capacitive coupling may, in some embodiments, be used primarily in a touch-sensitive screen to detect when an object touches the cover of the touch-sensitive screen.
  • 1D illustrates a system 300 with a two-layered configuration of electrodes that implement a mutual capacitance coupling. In particular embodiments, the electrode configuration of system 300 from 1C an example of an electrode configuration of a touch sensor 10 from 1A be.
  • According to the illustrated embodiment, a finger causes 324 that field lines 316 which are usually from the drive electrodes 304 to the readout electrodes 308 over the substrate 310 couple, through fingers 324 , as in 320 shown to be absorbed. The result is a detectable change in the capacitance of the capacitive node, which is caused by the drive electrode 304 and the readout electrode 308 is formed. In particular embodiments, a change in capacitance is associated with a variety of factors such as the fingerprint area, the electrode area, the thickness, and the dielectric constant of the cover plate 312 , the size of the human body and the location, the thickness and conductivity of the skin and other factors. In particular embodiments, the change in capacity will be through receivers 332 detected.
  • 1E illustrates an example of a touch sensor 400 which has a two-layered configuration of the electrodes and which implements a mutual capacitance coupling. In particular embodiments, touch sensor 400 from 1E an example of a touch sensor of 1A be.
  • According to the illustrated embodiment, touch sensor includes 400 , Edges, sense electrodes and drive electrodes edges (which in 1E as an edge 404a , Edge 404b , Edge 404c and edge 404d are shown) include a boundary between the touch-sensitive surface of the touch sensor 400 and the non-touch-sensitive surface of the touch sensor. In particular embodiments, a touch (or proximity) will be through touch sensor 400 detected when a user touch sensor 400 touched (or comes close) within the edges.
  • The drive electrodes (of which one in 1 as drive electrode 408 is shown) and the readout electrodes (one of which as Ausleseelektrode 412 in 1E ) each consist of a surface of conductive material occupying a shape, such as a circular disk, a square, a rectangle or other suitable shape, or any suitable combination thereof. As in the illustrated embodiment, the Driving electrodes in a pattern on one side of a substrate and the readout electrodes arranged in a pattern on another side of the substrate. In such a configuration, a crossover of a sense electrode and a drive electrode may form a capacitive node (one of which as a capacitive node 416 is shown). Such a crossover may be a location where the drive electrode and the sense electrode cross each other or come closest to their respective planes. The drive and sense electrodes are not in electrical contact with each other and instead are capacitively coupled to each other across the substrate at the crossover.
  • As illustrated, touch sensor includes 400 an example pattern for the drive electrodes and the readout electrodes. According to the illustrated embodiment, the drive electrodes (like the drive electrode) run 408 ) parallel to the edge 404a and to the edge 404d , In particular embodiments, the drive electrode may be approximately parallel to the edge 404a and edge 404d run. For example, the drive electrodes may be approximately parallel to the edge 404a and edge 404d due to one or more deviations in the shape of the edge 404a , the edge 404d and / or the drive electrodes. In addition, each adjacent drive electrode may be separated from the next drive electrode by a gap (one of which is in 1E as drive electrode gap 420 is illustrated). In particular embodiments, each drive electrode gap may have any suitable size. For example, each space can be 30 microns in size. As another example, each gap may be 300 μm in size. As another example, any gap 30 be up to 300 microns in size. As another example, each gap may be smaller than 30 μm or larger than 300 μm.
  • In the illustrated embodiment, the readout electrodes (such as readout electrode 412 ) parallel to the edge 404b and edge 404c located. In particular embodiments, the sense electrodes may be approximately parallel to the edge 404b and edge 404c be located. For example, the sense electrodes may be approximately parallel to the edge 404b and edge 404c due to one or more deviations in the shape of the edge 404b , Edge 404c and / or the readout electrodes. In addition, each adjacent readout electrode may be separated from the next readout electrode by a gap (one of which is shown in FIG 1E as readout electrode gap 424 is illustrated). In particular embodiments, each readout electrode gap may have any suitable size. For example, each gap can be 3 mm. As another example, each gap may be 7 mm. As another example, each gap may be 3 mm to 7 mm. As another example, each gap may be less than 3 mm or more than 7 mm.
  • 1F illustrates another example of a touch sensor 500 , which has a two-layered configuration of electrodes, and which implements a mutual capacitance coupling. In particular embodiments, the touch sensor 500 from 1F an example of a touch sensor 10 from 1A be.
  • According to the illustrated embodiment, touch sensor includes 500 Edges, drive electrodes and readout electrodes. The drive electrodes (where an in 1F as drive electrode 508 is illustrated) and readout electrodes (one as a readout electrode 520 in 1F illustrated) each consist of a surface of conductive material occupying a shape such as a circular disk, a square, a rectangle or other suitable shapes or any other suitable combination thereof. In the illustrated embodiment, the drive electrodes are arranged in a pattern on one side of a substrate, and the sense electrodes are arranged in a pattern on another side of the substrate. In such a configuration, a crossover of a sense electrode and a drive electrode may form a capacitive node (one as a capacitive node 532 is illustrated). Such a crossover may be a position where the drive electrode and the sense electrode cross or come closest to each other in their respective planes. The drive and sense electrodes are not in electrical contact with each other and instead are capacitively coupled to each other across the substrate at the crossover.
  • According to the illustrated embodiment, each drive electrode includes a central track (one as a central track 512 in 1F is illustrated) and one or more conductive surfaces of the drive electrodes (one being conductive surfaces of the drive electrode 516 in 1F is illustrated). In one embodiment, the conductive surfaces of the drive electrode may have any suitable shape, such as a circular disk, a square, a rectangle, a diamond shape, or other suitable shapes, or any suitable combination thereof. In particular embodiments, the conductive surfaces of the drive electrode may contact the touch sensor 500 Allow a user to detect when a user is in contact with (or near) an area of the touch sensor 500 comes, which is located between the central tracks of the drive electrodes (as well as between Zentralbahn 512 the drive electrode 508 and the central path of the next adjacent drive electrode). In particular, if a user in contact (or proximity) of a surface of the touch sensor 500 a sufficient interpolated signal is generated, which lies between the central tracks of the drive electrodes, based on the fact that the user comes in contact (or in the vicinity) to each of the conductive surfaces of the drive electrode of the adjacent drive electrodes (in contrast to the central tracks themselves) ,
  • According to the illustrated embodiment, each readout electrode includes a central track (one of which is in 1F as a central railway 524 is illustrated) and one or more conductive elements (one of which as conductive elements 528 in 1F is illustrated). In particular embodiments, the conductive elements may have any suitable shape, such as a circular disk, square, rectangle, diamond shape or other suitable shape, or any suitable combination thereof. In particular embodiments, the conductive elements may include a plurality of conductive structures that may extend in a pattern from each side of each central web. In particular embodiments, the patterns may be any suitable patterns. As an example, as in 1F As illustrated, the pattern of the conductive structures of the conductive element may be similar to a snowflake. In particular embodiments, the conductive element may contact the touch sensor 500 allow a user to detect when a user is in contact (or near) a surface of the touch sensor 500 which is located between the central track of the readout electrodes (as well as between the central track 524 the readout electrode 520 and the central path of the next adjacent readout electrode). In particular, when a user is in contact (or near) a surface of the touch sensor 500 which is located between the central tracks of the sense electrodes, a sufficient interpolated signal is generated based on a user coming in (or near) to each of the crossed parts of the adjacent sense electrodes (as opposed to the central tracks themselves) ,
  • As shown, touch sensor includes 500 an example pattern of drive electrodes and sense electrodes. According to the illustrated embodiment, the central tracks of the drive electrodes (such as the central track 512 the drive electrode 508 ) parallel to the edge 504a and the edge 504d , In particular embodiments, the central tracks may be approximately parallel to the edge 504a and the edge 504d be located. For example, the central tracks may be approximately parallel to the edge 504a and the edge 504d due to one or more deviations in the shape of the edge 504a , the edge 504d and / or the Zentralbahn.
  • According to the illustrated embodiment, the central tracks of the readout electrodes (such as the central web 524 the readout electrode 520 ) parallel to edge 504b and edge 504c located. In particular embodiments, the central tracks may be approximately parallel to the edge 504b and the edge 504c be located. For example, the central tracks may be approximately parallel to the edge 504b and the edge 504c due to one or more deviations in the shape of the edge 504b , the edge 504c and / or the Zentralbahn.
  • 1G illustrates another example of a touch sensor 600 which has a two-layered configuration of electrodes and which implements a mutual capacitance coupling. In particular embodiments, touch sensor 600 from 1G an example of the touch sensor 10 from 1A be.
  • According to the illustrated embodiment, touch sensor includes 600 Edges, drive electrodes and readout electrodes, which are described in detail in 1F are described. The readout electrodes of the touch sensor 600 in 1G however, include conductive surfaces of the readout electrode (one being used as the conductive surface 528 the readout electrode in 1G illustrated), each having a shape of a diamond. In addition, the drive electrodes of the touch sensor include 600 from 1G conductive surfaces of the drive electrode (one as a conductive surface 516 the drive electrode in 1G illustrated), each having a shape of a diamond. Although the conductive surfaces of the sense electrode and the conductive surfaces of the drive electrode each having the shape of a diamond are illustrated, either the conductive surfaces of the sense electrode, the conductive surfaces of the drive electrode, or both may have any other shape, such as a circular disk, a square , a rectangle or any other suitable shape or any suitable combination of these.
  • In particular embodiments, touch sensor 400 from 1E , Touch sensor 500 from 1F and touch sensor 600 from 1G be inadequate. For example, as discussed above, the electrodes used in touch sensor implement 400 , Touch sensor 500 and touch sensor 600 are included, a Gegenkapazitätskopplung. Electrodes implementing counter capacitance coupling may be suitable for detecting when an object (such as a finger) touches the cover of a touch sensor. However, they may not be well suited to detect when an object (such as a finger) near the cover comes, the cover but not touched (eg the detection of proximity). In addition, and unlike electrodes that implement mutual capacitive coupling, electrodes that implement self-capacitance coupling may be well-suited for detecting an object near the cover but not touching it. However, they may not be well suited for detecting an object which contacts the cover of the touch sensor.
  • In order to provide a touch-sensitive screen which is well-suited to detect when an object touches the cover and is also well suited to detect when an object is close to the cover, typically various electrodes implementing counter capacitance coupling have been used in touch-sensitive touch-screen sensors. while typically various electrodes which implement self-capacitive coupling have additionally been used on the sides of the touch-sensitive screens (eg, they have not been added to the touch-sensor itself). For example, in terms of touch sensor 400 from 1E For example, various electrodes have been typified to implement self-capacitance coupling to regions outside the edges of the touch sensor 400 added (as well as outside the area, which by the edge 404a , the edge 404b , the edge 404c and the edge 404d is spanned). As another example, in terms of touch sensor 500 from 1F and touch sensor 600 from 1G For example, various electrodes that implement self-capacitance coupling have typically become areas outside the edges of the touch sensor 500 and the touch sensor 600 added (as well as outside the area, which by the edge 504a , the edge 504b , the edge 504c and the edge 504d is spanned). As such, these electrodes, which implement self-capacitive coupling, have typically been added in a touch-insensitive area of the touch-sensitive screen to provide better proximity detection. In various embodiments, the electrodes that implement self-capacitance coupling have typically been mounted outside the edges of a touch sensor (as opposed to within the edges of the touch sensor) because such a configuration can avoid interference. For example, the pulses of the electric field emitted by the electrodes that implement self-capacitance coupling may interfere with the pulses of the electric fields that propagate through the electrodes that implement a mutual capacitance coupling. By attaching the electrodes that implement self-capacitance coupling to an area outside the edges of a touch sensor, the electrodes that implement self-capacitance coupling typically do not interfere with the electrodes that implement a mutual capacitive coupling.
  • In particular embodiments, and although various electrodes implementing self-capacitive coupling are additionally mounted on an area outside the edges of a touch sensor to allow a touch screen to provide better proximity detection, the detection of proximity of the touch screen may only be outside the edges of the touch sensor can be improved. Accordingly, such typical solutions may not enhance the ability of the touch-sensitive screen to detect the proximity of an object within the edges of the touch-sensitive screen (as well as within the area defined by the edge 404a , the edge 404b , the edge 404c and the edge 404d in 1E is spanned or within the area, which by the edge 504a , the edge 504b , the edge 504c and the edge 504d from 1F and 1G is spanned). As such, the typical solutions for providing an improved touch screen display are inadequate.
  • In particular embodiments, the imperfections of the touch sensor 400 from 1E , the touch sensor 500 from 1F , the touch sensor 600 from 1G and any other touch sensor that includes electrodes that implement counter capacitance coupling (as well as touch sensors that include electrode patterns with interleaved drive electrodes, interleaved sense electrodes, a single-layer configuration, and / or a two-layer configuration) through a touch sensor that includes both electrodes that provide a negative capacitance coupling implement and electrodes that implement a self-capacitive coupling. By positioning both electrodes which implement a mutual capacitive coupling and electrodes which implement self-capacitive coupling within the edges of such a touch sensor, the touch sensor (and the touch screen), in particular embodiments, can provide good detection of both an object, which contacts the cover of the touch sensor and provides an object which comes only near the cover of the touch sensor (as opposed to an actual touch). The 2A . 2 B . 3 and 4 Illustrate examples of a touch sensor that includes both electrodes that implement mutual capacitance coupling and electrodes that have self-capacitance coupling implement, according to particular embodiments includes.
  • 2A illustrates an example of a touch sensor 700 , which includes both electrodes, which implement a Gegenkapazitätskopplung and electrodes, which implement a self-capacitive coupling. In particular embodiments, touch sensor 700 similar to touch sensor 400 from 1E Be except that touch sensor 700 both include electrodes that implement mutual capacitance coupling and electrodes that implement self-capacitive coupling.
  • According to the illustrated embodiment, touch sensor includes 700 Electrodes implementing a counter capacitance coupling (an example of which is in US Pat 2A as counter-capacitive coupled electrodes 728 illustrated) and electrodes that implement self-capacitive coupling (an example of which is in FIG 2A as self-capacitive coupled electrode 732 illustrated). In the illustrated embodiment, oppositely coupled electrodes can drive electrodes (one as drive electrode 708 in 2A is illustrated) and Ausleseelektroden contain (where one as Ausleseelektrode 712 in 2A illustrated) which may cross each other to form a capacitive node (one as a counter capacitive node 716 is illustrated). Such a crossover may be a location where the drive electrode and the sense electrode cross or come closest to each other in their respective planes. The drive and sense electrodes are not in electrical contact with each other and instead are capacitively coupled to each other across the substrate at the crossover.
  • In addition, the self-capacitively coupled electrodes (where a self-capacitive coupled electrode 732 in 1G is shown) form a single capacitive node (which is shown in FIG 2A as self-capacitive node 736 is illustrated). In particular embodiments, although there are multiple self-capacitively coupled electrodes, only one self-capacitive node is formed. In particular embodiments, this self-capacitive node may generally have the same shape and position as each of the self-capacitively coupled electrodes. As such, when an object comes close to the position of one of the self-capacitively coupled electrodes, the self-capacitive node may detect the object. In particular embodiments, each self-capacitive coupled electrode may form part of the self-capacitive node. For example, the self-capacitive coupled electrode 732 form the part of the self-capacitive node which coincides with the location of the self-capacitive coupled electrode 732 corresponds.
  • In particular embodiments, the self-capacitively coupled electrodes may be of any type in the touch sensor 700 be positioned. For example, and according to the illustrated embodiment, the self-capacitive coupling electrodes (such as the self-capacitance coupling electrode 732 ) may be positioned in a gap between adjacent sense electrodes of the opposing capacitive coupling electrodes (as in readout electrode gap) 724 ). In particular embodiments, each self-capacitive coupling electrode may be located anywhere in the sense electrode columns of the touch sensor 700 be positioned. For example, each self-capacitive coupling electrode may be positioned in a sense electrode gap such that it is halfway between each adjacent sense electrode. As another example, each self-capacitive coupling electrode may be positioned 0.1 mm to 0.4 mm from each readout electrode of the anti-capacitively coupling electrodes.
  • By positioning each self-capacitively coupled electrode in the readout electrode gaps (eg, between adjacent readout electrodes of the anti-capacitively coupling electrodes), at least a portion of the self-capacitive node may, in particular embodiments, be positioned between two adjacent opposing capacitive nodes. For example, as described above, the counter capacitance electrodes may form a plurality of counter capacitance nodes (one as a counter capacitive node 716 is illustrated). In addition, the self-capacitive electrodes can form a single self-capacitance node (which as a self-capacitance node 736 is illustrated). In particular embodiments, when the self-capacitive coupling electrodes are positioned in the sense electrode columns (eg, between adjacent sense electrodes of the anti-capacitively coupling electrodes), at least a portion of the self-capacitive node may be located between at least two adjacent opposing capacitive nodes. For example and as in 2A a part of the self-capacitive node can be illustrated 736 (like the part of the self-capacitance electrode 732 shaped) between the counter capacitance node 716 (shaped by the counter capacitive coupled electrode 728 ) and the next adjacent counter-capacitance node (which through the counter-capacitive coupled electrode connected to the counter capacitively coupled electrode 728 is adjacent, is formed).
  • In particular embodiments, both anti-capacitively coupled electrodes and self-capacitively coupled electrodes emit pulses of an electric field (as described in detail in FIGS 1B to 1D discussed) to form capacitive nodes. In particular embodiments, the self-capacitive coupling electrodes in touch sensor 700 be positioned so that they do not interfere with the pulsing of an electric field from the anti-capacitively coupling electrodes. In particular embodiments, an inherently capacitively coupled electrode may not interfere with the pulses of an electric field of the oppositely-coupled electrodes (both including a drive electrode and a sense electrode (sense electrode)) when the self-capacitance coupling electrode is 0.1 mm to 0.4 mm each readout electrode of the counter capacitive coupling electrodes is positioned.
  • In particular embodiments, the pulses of electric fields emitted by the self-capacitance coupling electrodes and the anti-capacitively coupling electrodes may be synchronized so as to avoid interference. For example, in particular embodiments, the pulses of the electric field emitted by the anti-capacitively coupling electrodes may be synchronized with the pulses of the electric field emitted by the self-capacitive coupling electrodes, such that only pulses from one of the pulses are emitted at any one time oppositely coupling electrodes or the self-capacitive coupling electrodes are emitted and not both. As such, the pulses of an electric field emitted by the self-capacitive coupling electrodes may not interfere with the pulses of an electric field emitted by the anti-capacitively coupling electrodes.
  • Because the touch sensor 700 both include electrodes that implement mutual capacitive coupling, and electrodes that implement self-capacitance coupling may, according to the illustrated embodiment, be a touch-sensitive screen incorporating the touch sensor 700 uses a good detection of both, an object that touches the cover of the touch sensor and an object that comes only in the vicinity of the cover of the touch sensor (as opposed to an actual touch), provide. In addition, since the electrodes that implement self-capacitance coupling are located within the edges of the touch sensor (eg, within the area defined by the edge 704a , the edge 704b , the edge 704c and the edge 704d is spanned), better detection of proximity (of an object) within the edges of the touch sensor can be provided. As such, the touch screen may provide better proximity detection.
  • 2 B illustrates a touch sensor 800 , which includes both electrodes, which implement a Gegenkapazitätskopplung and electrodes, which implement a self-capacitive coupling. In particular embodiments, touch sensor 800 similar to touch sensor 400 from 1E Be except that touch sensor 800 both include electrodes that implement mutual capacitive coupling and electrodes that implement self-capacitive coupling.
  • According to the illustrated embodiment, touch sensor includes 800 Electrodes implementing counter capacitance coupling (one example being counter capacitive coupled electrodes 728 in 2 B and electrodes implementing self-capacitive coupling (taking as an example the self-capacitively coupled electrode 732 in 2 B is illustrated).
  • In contrast to 2A and according to the embodiment as in 2 B illustrated, the self-capacitive coupling electrodes (as well as the self-capacitive coupling electrode 732 ) between the adjacent drive electrodes of the counter capacitive coupling electrodes (as well as in the drive electrode gap 720 ). In particular embodiments, to position the self-capacitive coupling electrodes in the drive electrode columns, the size of the gaps may be increased. For example, the size of the column can be increased from 30 μm to 300 μm to 1 mm to 2 mm. In particular embodiments, any self-capacitive coupling electrode may be located anywhere in the drive electrode gap of touch sensor 800 be positioned. For example, each self-capacitive coupling electrode in the drive electrode gap may be positioned to be halfway between each adjacent drive electrode. As another example, each self-capacitive coupling electrode may be positioned 0.03 mm to 0.4 mm away from each drive electrode of the anti-capacitively coupling electrodes.
  • By positioning each self-capacitive coupling electrode in the drive electrode columns (eg. between adjacent drive electrodes of the counter-capacitive coupling electrodes), in particular embodiments, at least a portion of the self-capacitance node between two adjacent Gegenkapazitätsknoten be located. For example, as described above, the counter capacitance electrodes may form a plurality of counter capacitance nodes (one of which as a counter capacitance node 716 is illustrated). In addition, the self-capacitance electrodes may also form a single self-capacitance node (which as a self-capacitance node 736 is illustrated). In particular embodiments, when the self-capacitance coupling electrodes are positioned in the drive electrode columns (eg, between adjacent drive electrodes of the anti-capacitively coupling electrodes), at least a portion of the self-capacitance node may be positioned between at least two adjacent mutual capacitance nodes. For example and as in 2 B illustrated, can be part of the self-sufficient node 736 (like the part of the self-capacitance electrode 732 is formed) between Gegenkapazitätsknoten 716 (shaped by the gegenkapazitiv coupling electrode 728 ) and the next adjacent counter-capacitance node (which passes through the counter-capacitive coupling electrode adjacent to the counter-capacitive coupling electrode 728 is located).
  • In particular embodiments, each of the two oppositely coupling electrodes and the self-capacitive coupling electrodes emits pulses of an electric field (as described in detail in US Pat 1B to 1D discussed) to form capacitive nodes. In particular embodiments, the self-capacitive coupling electrodes may be in touch sensor 800 be positioned so that they do not interfere with the pulsing of an electric field of the gegenkapazitiv coupling electrodes. In particular embodiments, an auto-capacitively coupling electrode may not interfere with the pulses of an electric field of the anti-capacitively coupling electrodes (including both a drive electrode and a receiver electrode) when the self-capacitive coupling electrode is 0.03 mm to 0.4 mm from each drive electrode is positioned remotely capacitively coupling electrodes away.
  • In particular embodiments, the pulses of electric fields emitted by the self-capacitance coupling electrodes and the anti-capacitively coupling electrodes may be synchronized to prevent interference. For example, and in particular embodiments, the pulses of the electric field emitted by the self-capacitive coupling electrodes may be synchronized with the pulses of the electric field emitted by the anti-capacitively coupling electrodes, such that pulses of only be emitted to the gegenkapazitiv coupling electrodes or the self-capacitive coupling electrodes and not both. As such, the pulses of an electric field emitted by the self-capacitive coupling electrodes may not interfere with the pulses of electric fields emitted by counter-capacitive coupling electrodes.
  • According to the illustrated embodiment, a touch-sensitive screen, which touch sensor 800 implements, a good detection of both, an object which touches the cover of the touch sensor and provide an object which comes only in the vicinity of the cover of the touch sensor (as opposed to an actual touch), as touch sensor 800 both, electrodes that implement mutual capacitance coupling and electrodes that implement self-capacitive coupling. Moreover, since the electrodes that implement self-capacitance coupling are located within the edges of the touch sensor (eg, within the area defined by the edge 704a , the edge 704b , the edge 704c and the edge 704d spanning), better proximity detection (of an object) can be provided within the edges of the touch sensor. As such, the touch screen may provide closer detection of proximity.
  • 3 illustrates a touch sensor 900 , which includes both, electrodes that implement mutual capacitance coupling and electrodes that implement self-capacitive coupling. In particular embodiments, touch sensor 900 similar to touch sensor 500 from 1F Be except that touch sensor 900 both include electrodes that implement mutual capacitive coupling and electrodes that implement self-capacitive coupling.
  • According to the illustrated embodiment, touch sensor includes 900 Electrodes implementing a mutual capacitance coupling (an example is an anti-capacitive coupling electrode 936 in 3 illustrated) and electrodes which implement self-capacitance coupling (one of which as an inherently capacitive coupling electrode 944 in 3 is illustrated).
  • In the illustrated embodiment, the counter-capacitive coupling electrodes may comprise drive electrodes (one of which serves as a drive electrode 908 in 3 is illustrated) and readout electrodes (one of which as a readout electrode 920 in 3 illustrated) which may intersect each other to form capacitive nodes (one of which as a counter capacitance node 932 is illustrated). Such a crossover may be a location where the drive electrode and the sense electrode cross each other or come closest to their respective planes. The drive and sense electrodes are not in electrical contact with each other and instead are capacitively coupled to each other via a substrate at the crossover.
  • In addition, the self-capacitive coupling electrodes can form a single capacitive node (which is described in US Pat 3 as a self-sufficient node 948 is illustrated). In particular Embodiments, only one self-capacitance node is present, although there are multiple self-capacitive coupling electrodes. In particular embodiments, this one self-capacitance node may generally have the same shape and positioning as each of the self-capacitance coupling electrodes. As such, the self-capacitance node may detect an object when an object comes near the location of one of the self-capacitive coupling electrodes. In particular embodiments, each of the self-capacitance coupling electrodes may form part of a self-capacitance node. For example, the self-capacitive coupling electrode 944 make up the part of the self-capacitive node which coincides with the location of the self-capacitive coupling electrode 944 corresponds.
  • In particular embodiments, the self-capacitive coupling electrodes may be used in any manner in the touch sensor 900 be positioned. For example, and according to the illustrated embodiment, the self-capacitive coupling electrodes (such as self-capacitive coupling electrodes 944 ) may be positioned in the drive electrodes. In particular, the drive electrodes (one of which as drive electrode 908 illustrated) include one or more recessed (or hollowed out) portions (one of which is a recessed portion 940 in 3 is illustrated). In particular embodiments, the recessed portions of the drive electrodes may refer to all portions of the drive electrodes where the conductive material of the drive electrode has been removed. In particular embodiments, the conductive material of the drive electrode may be removed in any suitable manner. In particular embodiments, the recessed portion of the drive electrode may have any suitable size and shape. For example, the recessed shape of the drive electrode may be shaped as a circular disk, a square, a rectangle, a diamond, or other suitable shapes, or any suitable combination of these. In particular embodiments, the self-capacitive coupling electrodes (of which an electrode coupling as self-capacitive 944 illustrated) may be positioned in the recessed portions of the drive electrodes (as well as within the recessed portion 940 positioned).
  • In particular embodiments, the recessed portions of the drive electrodes may be positioned in any position in the sense electrode. For example, the recessed portion may be located in a central path (or central path) of the drive electrodes (as in the central track 912 ). As another example, the recessed portions may be located in the conductive areas of the drive electrodes (as in the conductive area 916 ). Even more, though 3 illustrates a recessed portion in each conductive surface of each drive electrode (and an inherently capacitive coupling electrode within the recessed portion), the recessed portions of the drive electrodes (and the self-capacitance coupling electrode) may, in particular embodiments, not be located in all of the conductive areas of the drive electrodes , For example, the recessed portions of the drive electrodes (and the self-capacitance coupling electrode) may be located only in some (as well as one or more) of the conductive areas of the drive electrodes.
  • In particular embodiments, the pulses of electric fields emitted by the self-capacitance coupling electrodes and the anti-capacitively coupling electrodes may be synchronized to prevent interference. Thus, the pulses of the electric field emitted by the anti-capacitively coupling electrodes may be synchronized with the pulses of the electric field emitted by the self-capacitive coupling electrodes, such that only pulses from the oppositely coupled electrodes or at any time are synchronized the self-capacitively coupled electrodes are emitted and not both. As such, the pulses of electric field emitted by the self-capacitive coupling electrodes may not interfere with the pulses of electric field emitted by the counter-capacitive coupling electrodes.
  • According to the illustrated embodiment, a touch-sensitive screen, which touch sensor 900 includes providing a good detection of both an object that touches the cover of a touch sensor and an object that comes close to the cover of the touch sensor (as opposed to the actual touch) because touch sensor 900 both include electrodes that implement mutual capacitive coupling and electrodes that implement self-capacitive coupling. Moreover, since the electrodes that implement self-capacitive coupling are located within the edges of the touch sensor (eg, within the area defined by the edge 904 , the edge 904b , the edge 904c and the edge 904d is clamped), a better sewing detection within the edges of the touch sensor can be provided. As such, the touch-sensitive screen may provide a more accurate proximity (object) detection.
  • 4 illustrates a touch sensor 1000 , which includes both, electrodes that implement mutual capacitance coupling and electrodes, which self-capacitance coupling to implement. In particular embodiments, touch sensor 1000 similar to touch sensor 600 from 1G Be except that touch sensor 1000 both include electrodes that implement mutual capacitive coupling and electrodes that implement self-capacitive coupling. In particular embodiments, the electrodes that implement counter capacitance coupling (of which an electrode coupled as a negative capacitance 936 in 4 illustrated) and the electrodes which implement self-capacitive coupling (an example of which is an inherently capacitive coupling electrode 944 in 4 illustrated) may be similar to those relating to 3 are described.
  • However and contrary to 3 can the self-capacitive coupling electrodes in 4 be positioned in both the drive electrodes and the sense electrodes. In particular, the drive electrodes (one of which serves as a drive electrode 908 is illustrated) and the readout electrodes (one of which as Ausleseelektrode 912 illustrated) include one or more recessed portions (examples of which are recessed portions 940a and 940b in 4 are illustrated). In particular embodiments, the recessed portions of the drive electrodes and the sense electrodes may refer to all portions of the drive electrode and the sense electrode where the drive electrode or sense electrode conductive material has been removed. In particular embodiments, the conductive material of the drive electrode or the sense electrode may be removed in any suitable manner. In particular embodiments, the recessed portion of the sense electrode or drive electrode may be any suitable size and shape. For example, the recessed portion of the drive electrode or readout electrode may be shaped such as a circular disk, square, rectangle, diamond, other suitable shapes, or other suitable combination thereof. In particular embodiments, the self-capacitive coupling electrodes (examples of these are self-capacitive coupling electrodes 944a and 944b illustrated) may be positioned in the recessed portions of the drive electrodes and the sense electrodes (as well as within the recessed portions 940a and 940b positioned).
  • In particular embodiments, the recessed portions of the drive electrodes and the sense electrodes may be positioned at each location in the drive electrodes and the sense electrodes. For example, the recessed portions in the central path of the drive electrodes (such as central track 912 ) and the central path of the readout electrode (such as Zentralbahn 924 ). As another example, the recessed portions in the conductive areas of the drive electrodes (such as the conductive area 916 ) and the conductive areas of the sense electrodes (as in the conductive area) 928 ). Even more, though 4 illustrates a recessed portion in each conductive surface of each drive electrode and each sense electrode (and an inherently capacitive coupling electrode within the recessed portion), the recessed portions of the drive electrodes and the sensor electrodes, in particular embodiments (and the self-capacitance coupling electrodes), may not in all conductive surfaces of the drive electrodes and / or the readout electrodes be located. For example, the recessed portions of the drive electrodes and the sense electrodes (and the self-capacitance coupling electrodes) may be located only in some (such as one or more) of the conductive areas of the drive electrodes and / or the sense electrodes. In addition, in particular embodiments, the recessed portions (and the self-capacitance electrodes) may be located only in the drive electrodes or in the sense electrodes (as opposed to within both the drive and sense electrodes).
  • According to the illustrated embodiment, a touch-sensitive screen, which touch sensor 1000 used, a good detection of both, an object that touches the cover of a touch sensor and provide an object that comes only near the cover of the sensor (as opposed to the actual touch), as the touch sensor 1000 both, electrodes that implement mutual capacitance coupling and electrodes that implement self-capacitive coupling. Moreover, since the electrodes, which include self-capacitance coupling, are located within the edges of the touch sensor (eg, within the area defined by the edge 904 , the edge 904b , the edge 904c and the edge 904d spanning), better proximity detection (of an object) can be provided within the edges of the touch sensor. As such, the touch screen may provide closer detection of proximity.
  • Modifications, additions or omission may be made to the touch sensors of the 2A to 4 without departing from the present disclosure. For example, although each of the 2A to 4 illustrates a particular embodiment for providing good detection of both an object which contacts the cover of the touch sensor and an object which comes close to the cover of the touch sensor, in particular embodiments, two or more particular embodiments, which in 2A to 4 are illustrated, combined. In particular embodiments, with reference to FIGS 2A and 2 B , Electrodes implementing self-capacitance coupling may be located in the spaces between the adjacent sense electrodes of the anti-capacitively coupling electrodes and the spaces between the adjacent drive electrodes of the anti-capacitively coupling electrodes. As another example, although the 2A to 4 Illustrate examples of touch sensors having particular electrode patterns that include touch sensors of each electrode pattern, including both electrodes that implement mutual capacitance coupling and electrodes that implement self-capacitive coupling. Specifically, both electrodes that implement mutual capacitive coupling and electrodes that implement self-capacitive coupling may be included in any other touch sensor electrode pattern, as well as any electrode pattern having a single-layer configuration or a two-layer configuration.
  • 5 illustrates a device which connects each of the touch sensors of the 1A to 4 may include. The device 1100 It may include a desktop computer, a laptop computer, a tablet computer, a PDA, a smartphone, a satellite navigation device, a telephone, a cell phone, a portable player, a portable game console, a kiosk computer, a cash register system, household appliances, cash machines, and the like other devices or any combination of the foregoing.
  • In the illustrated embodiment, device includes 1100 a touch-sensitive screen 1104 , The touch-sensitive screen 1104 allows the touch screen to present a wide variety of data, including a keyboard, a numeric keypad, program or application icons, and a variety of other desired interfaces. The user can use the device 1100 interact by using the touch-sensitive screen 1104 is touched with a single finger (or any other object) to select a program to execute or to type a letter on a keyboard displayed on the touch-sensitive screen 1104 is shown. In addition, the user may use multiple touches, such as zooming in or out, when viewing a document or image. In particular embodiments of device 1100 , as well as household appliances, can be the touch-sensitive display 1104 do not or only slightly change during operation and operation, and can detect only single touches.
  • The present disclosure includes all changes, substitutions, variations, alterations, and modifications of the example embodiments that those skilled in the art would contemplate. Furthermore, in the appended claims, reference to a device or system or component of a device or system adapted to perform a particular function includes that device, system, or component, whether or not these certain feature is enabled, enabled, or unlocked as long as that device, system, or component is set up to perform this function.

Claims (20)

  1. A touch sensor having a first edge and a second edge that is approximately perpendicular to the first edge, wherein the touch sensor comprises: a first plurality of electrodes which are approximately parallel to the first edge; a second plurality of electrodes which are approximately parallel to the second edge; a first plurality of nodes, each of the first plurality of nodes being formed by capacitive coupling between an electrode of the first plurality of electrodes and an electrode of the second plurality of electrodes; a third plurality of electrodes; a second node formed by the third plurality of electrodes, each of the third plurality of electrodes forming part of the second node by self-capacitance coupling; and wherein at least one of the portions of the second node is positioned between at least two of the first plurality of nodes.
  2. The touch sensor according to claim 1, wherein: the second plurality of electrodes are each separated from each other by a gap; and the third plurality of electrodes are positioned in the plurality of spaces.
  3. The touch sensor according to claim 1, wherein: the first plurality of electrodes are each separated from each other by a gap; and the third plurality of electrodes are positioned in the plurality of spaces.
  4. The touch sensor according to claim 1, wherein: each of the first plurality of electrodes is configured to pulse a first electric field toward one or more of the second plurality of electrodes; each of the third plurality of electrodes is configured to pulse a second electric field through a cover disk positioned over the touch sensor; and the pulses of the first electric fields are alternately synchronized with the pulses of the second electric fields to prevent interference.
  5. The touch sensor of claim 1, wherein each of the third plurality of electrodes is positioned so as not to interfere with one or more pulses of electric field from each of the first plurality of electrodes.
  6. A touch sensor having a first edge and a second edge that is approximately perpendicular to the first edge, wherein the touch sensor comprises: a first plurality of electrodes, wherein at least one of the first plurality of electrodes comprises a recessed portion; a second plurality of electrodes; a first plurality of nodes, each of the first plurality of nodes being formed by capacitive coupling between an electrode of the first plurality of electrodes and an electrode of the second plurality of electrodes; a third plurality of electrodes, wherein at least one of the third plurality of electrodes is positioned in the recessed portion of the at least one of the first plurality of electrodes; and a second node formed by the third plurality of electrodes, each of the third plurality of electrodes forming a portion of the second node by self-capacitance coupling.
  7. The touch sensor according to claim 6, wherein: each of the first plurality of electrodes comprises a portion which is recessed; and the plurality of third electrodes are positioned in the plurality of recessed portions.
  8. The touch sensor according to claim 6, wherein: at least one of the second plurality of electrodes comprises a recessed portion; and at least one second electrode of the third plurality of electrodes is positioned in the recessed portion of the at least one of the second plurality of electrodes.
  9. The touch sensor of claim 6, further comprising a substrate comprising a top and a bottom, wherein the first plurality of electrodes are positioned on the underside of the substrate, and wherein the second plurality of electrodes are positioned on top of the substrate.
  10. The touch sensor of claim 6, wherein each of the second plurality of electrodes comprises a plurality of conductive elements disposed in a snowflake design.
  11. A device comprising: a control unit; and a touch sensor having a first edge and a second edge that is approximately perpendicular to the first edge, wherein the touch sensor is connected to the control unit, and wherein the touch sensor comprises: a first plurality of electrodes which are approximately parallel to the first edge; a second plurality of electrodes which are approximately parallel to the second edge; a first plurality of nodes, each of the plurality of nodes being formed by a capacitive coupling between an electrode of the first plurality of electrodes and an electrode of the second plurality of electrodes; a third plurality of electrodes; a second node formed by the third plurality of electrodes, each of the third plurality of electrodes forming part of the second node by self-capacitance coupling; and wherein at least one of the portions of the second node is positioned between at least two of the first plurality of nodes.
  12. The device of claim 11, wherein: the second plurality of electrodes are each separated from each other by a gap; and the third plurality of electrodes are positioned in the plurality of spaces.
  13. The apparatus of claim 11, wherein: the first plurality of electrodes are each separated from each other by a gap; and the third plurality of electrodes are positioned in the plurality of spaces.
  14. The apparatus of claim 11, wherein: each of the first plurality of electrodes is configured to pulse a first electric field toward one or more of the second plurality of electrodes; each of the third plurality of electrodes is configured to pulse a second electric field through a cover disk positioned over the touch sensor; and the pulses of the first electric fields are alternately synchronized with the pulses of the second electric fields to prevent interference.
  15. The apparatus of claim 11, wherein each of the third plurality of electrodes is positioned so as not to interfere with one or more pulses of electric field from each of the first plurality of electrodes.
  16. A device comprising: a control unit; and a touch sensor having a first edge and a second edge that is approximately perpendicular to the first edge, wherein the touch sensor is coupled to the controller, and wherein the touch sensor comprises: a first plurality of electrodes, wherein at least one of the first plurality of electrodes recessed portion; a second plurality of electrodes; a first plurality of nodes, each of the first plurality of nodes being formed by a capacitive coupling between an electrode of the first plurality of electrodes and an electrode of the second plurality of electrodes; a third plurality of electrodes, wherein at least one of the third plurality of electrodes is positioned in the recessed portion of the at least one of the first plurality of electrodes; and a second node formed by the third plurality of electrodes, each of the third plurality of electrodes forming a portion of the second node by self-capacitance coupling.
  17. The apparatus of claim 16, wherein: each of the first plurality of electrodes comprises a portion which is recessed; and the plurality of third electrodes are positioned in the plurality of recessed portions.
  18. The apparatus of claim 16, wherein: at least one of the second plurality of electrodes comprises a recessed portion; and at least one second electrode of the third plurality of electrodes is positioned in the recessed portion of the at least one of the second plurality of electrodes.
  19. The device of claim 16, further comprising a substrate comprising a top and a bottom, wherein the first plurality of electrodes are positioned on the underside of the substrate, and wherein the second plurality of electrodes are positioned on top of the substrate.
  20. The apparatus of claim 16, wherein each of the second plurality of electrodes comprises a plurality of conductive elements disposed in a snowflake design.
DE201220101478 2011-12-16 2012-04-20 Touch sensor with counter capacitance electrodes and self-capacitance electrodes Expired - Lifetime DE202012101478U1 (en)

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